Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual 100 metros livre tem um 100 metros costas de palo verde?
 ###Tabelas: CREATE TABLE all-time_medal_table (all-time_medal_table_id AUTO_INCREMENT PRIMARY KEY, Nation VARCHAR, Gold INT, Silver INT, Bronze INT, Total INT) CREATE TABLE final_leaderboard (final_leaderboard_id AUTO_INCREMENT PRIMARY KEY, Place VARCHAR, Player VARCHAR, Country VARCHAR, Score VARCHAR, To par VARCHAR, Money ( $ ) INT) CREATE TABLE american_weekly_ratings (american_weekly_ratings_id AUTO_INCREMENT PRIMARY KEY, Episode VARCHAR, Air Date VARCHAR, Timeslot (EST) VARCHAR, Rating INT, Share VARCHAR, 18–49 Rating VARCHAR, Viewers (millions) INT, Rank VARCHAR) CREATE TABLE swimming_and_diving (swimming_and_diving_id AUTO_INCREMENT PRIMARY KEY, Combined VARCHAR, 50 yard Freestyle VARCHAR, 100 yard Freestyle VARCHAR, 200 yard Freestyle VARCHAR, 500 yard Freestyle VARCHAR, 100 yard Backstroke VARCHAR, 100 yard Butterfly VARCHAR) CREATE TABLE comparative_performance_in_the_latin_american_market (comparative_performance_in_the_latin_american_market_id AUTO_INCREMENT PRIMARY KEY, Selected Caribbean and n Latin America countries VARCHAR, Internl. tourist arrivals 2011 (x1000) INT, Internl. tourism receipts 2011 (million USD ) VARCHAR, Receipts per arrival 2010 (col 2)/(col 1) ( USD ) VARCHAR, Receipts per capita 2005 USD INT, Revenues as % of exports goods and services 2011 VARCHAR)  
SELECT 100 yard Freestyle FROM swimming_and_diving WHERE 100 yard Backstroke = palo verde